Eddy t



UNITE STATES PATENT OFFICE.

I EDDYIETHOMAS, ornnw YORK, N. Y.-

CASTER.

SPECIFICATION. forming part of Letters Patent No. 295,689, dated March 25, 1884-.

Application filed April 23, 1883. (No model.)

To aZZ whom it may concern:

Be it known that I, EDDY T. THOMAS, of New York, county and State of New York, have invented an Improvement in Oasters, of which the following description, in connection with the accompanying drawings, .is a specifieation, likeletters on the drawings representing like parts.

My invention relates to casters or rollers for the legs of sewing-machines, furniture, niachinery, or other articles, andhas for its object to enable the article upon which the invention is applied to be firmly supported when the floor is uneven, or where four legs adapted to bear all in one plane in' the usual manner would not all be supported, but would let the article or machine rock; or tilt upon two diagonally-opposite legs. r

Theinvention consists in the combination, with the leg of an article, preferably provided with a usual caster or roller, of an auxiliary automatic eccentric caster or bearing-roller or cam, which, in case the floor beneath it is depressed below the level of the portion of the.

floor supporting the other legs, will drop down automatically by its own gravity and rest upon the depressed part of thefloor, forming asupport for the leg of the machine or article of furniture, which will thus be held steadily and without the disagreeable tilting which usually takes place when afioor is uneven. The periphery of the eccentric roller is preferably roughened or provided with short flattened bearing portions, so as to prevent it from turning, and thus failing to support the leg properly.

Figure 1 is a front elevation, and Fig. 2 a

side elevatiomof a portion of the leg of asewing-machine table having an eccentric bearing-roller embodying this invention, the floor being shown as depressed underthe said leg below the general level (indicated by the dotted lines) of the portion supportingthe other legs. I I The leg a, of any suitableor usual construction, is shown as provided with the usual roller or caster, 1), adapted to rotate on axle c, to enable the article to be moved easily, and to support the said article when at rest. In case the floor F, under the leg a and caster b, is depressed below the general level indicated by the line 2 of the floor under the other legs of the article, the said leg will not be properly supported, and the article will rock or tilt. In order to obviate this and to afford a support for the leg a upon the depressed portion of the floor, the said leg is provided with the eccentric bearing-roller d, shown as also pivoted on the axle c, it dropping automatically under the action of gravity until it comes to a bearing on the depressed portion of the floor, as shown, and thus sustains the leg of the article. The. periphery of the said eccentric roller is roughened or provided with flat bearing-faces to prevent it from rotating under the weight sustained by the leg a, and thus permitting the said leg to sink down.

When the article is moved, it will roll on the caster b, as

usual, the eccentric supporting-roller or cam r legin case it should come to rest over a depressed spot in the floor.

It is obvious that swiveled casters of any usual construction may be provided with an auxiliary eccentric bearing-roller in accordance with this invention.

I claim 1. The combination, with the leg of an arti-' cle, of an eccentric bearing roller or cam, whereby the said article may be properly sup ported on an uneven floor, substantially as described.

2. The combination, with the main caster or an auxiliary eccentric bearing-roller or cam,

,roller rotating concentrically on an axis, of

substantially as and for the purpose de scribed. v In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

EDDY r. THOMAS.

JVitn esses BERNARD J. KELLY, BERNICE J. Novas. 

